Self-releasing davit-block hook for life-boats.



- C.. B.;P'REIS LER.. SELF nmAsmG mvn BLOCK HOOK FOR LIFE ums,

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APPLICATION FILED my 3. 1913'.

v In ven ("oz- 6 13. fwwu tvBatented Mar. 11, 1919. v

. the rings drawings,

s'r PAENT CBIS'I. B. PREISLER, O1! PORTLAND, OREGON.

SELF-RELEASING DAVIT-BLOCK HOOK FOR LIFE-BOATS.

Specification of Letters Patent.

rammeamar. ii, ieie.

Application filed uly 3, 193.8. V Serial No. 243,220.

- following is a specification.

y invention primarily relates to the hooks of the fall-blocks of the tackle by which life-boats are suspended from davits.

The object of my invention is to provide a hookfor the fall-block which shall automatically release itself from the rings of the boat when the latter is afloat, but shall securely -hold the boat until that moment. My invention also includes means for locking my book, so that its automatic action will for the time being be suspended, which provision renders my hook usable on pilot boats, and

alsofor other uses where ordinarily the hook shall not be self releasing; and such lock also prevents the accidental opening of the hook. a

My invention incidentally has ject simplicity of construction.

The construction and operation of my device is clearly shown in the accompanying in which:

Figure 1 is a side elevation of my davit block hook by itself;

Fig. 2 is a corresponding end elevation; in these figures are also shown means for lockin the hook against automatic opening and re easing; n

Fig. 3 shows my hook attached to one of of the boat, of which a part is shown; this view also illustrates the actions due to the floating of the boat, causing the automatic release of the hook from the rings of the boat; and

Fig'. 4; shows the hook after havin been automatically opened and having re eased the boat.

The main piece, a, of my hook has hinged for its obto it a member, I), by hinge-rivet 0 extending seat the transverse through said member and the boss d of the main piece a. ber 72 is hinged, by a hing bar f. The main piece, a, has a portion cut away so as to provide a recess 9, in which to latch-pin h provided in a a recess '11 of the latch-bar f. The member I) is provided with a projecting, releasing lug 7c. The life boat a is provided at eachend with a ring or eye-bolt m as usual. Such To the lower end ofthe mem-.

-rivet e, a latchring is provided with a link 7', and this is fastened on the latch-bar f of my hook, as shown in Fig; 3. The main-piece, a, is made with an eye a which is connected by a link 0 with the eye p of the band or shell of the fall-block, as shown in Fig. 'r, r represent parts of the rope bearing in the fall,- block. i

The self-releasing action of my hook is as follows: When the latch-pin h is seated in the recess 9 of the main piece a, a downward pull on the link j, secured on the latch bar I, will have a tendency to retain the latter in its closed position. But when the link j is subjected to an upward thrust it will abut against said releasing lug la, and in so doing rotate the member I) to the right, with respect to theposition of the parts in the drawings, and lift the latch bar f and cause its latch-pink to become unseated from the recess 9, as shown in full lines in Fig. 3. The continued upward thrust of the link 3' would next cause the upper part thereof to become wedged between the rounded extremity of the releasing lug k, and the latch bar 7, forcing the latter outward, as shown in broken outline in Fig. 3, thus permitting avity to act, and causin the latch-bar f" In Figs. 1 and 2 are also shown means for preventin the automatic opening of my hook, as escribed. As shown, these means consist of a bolt 8 sliding in a bearing t fastened to the member I); and the main piece a is provided with a recess or looking cavitya into which the extremity of the bolt may be rojected, as shown in Fig. 1. When so pro ected the upward thrust of the linkj against the releasing lug could have no effect, since any corresponding upward movement of the member I) is prevented. It would be necessary first to withdraw the bolt 8 from the cavity u in order to restore my hook to its" disclosed by me for e self-releasing are to be an or as a mere suggestion, and these means prising a main piece, a pendent member ,hinged thereto at one end, a latch bar hinged to the opposite end of said pendent member,

I the hinged end of said latch bar being adapted to have a. link secured thereon,'the pendent member having a releasing lug overlymg said hinged end of the' latch bar, and said main piece and the free end of said latch bar being provided with latching means adapted for-being disengaged by the lifting of the latch-bar.

2. A hook of the character described comprising a main piece, a pendent member hinged thereto at one end, a latch bar hinged to the opposite end of said pendent member, the hinged end of said latch bar being adapted to have a link secured thereon, the pend ent member having a releasing-lug overlying said hinged end of the latch bar, said main piece and the free end of said latch bar being provided with latching means adapted for being disengaged by the lifting of the latch-bar, and means for locking the pendent member with the main piece.

3. A hook of the character described comprising a main piece, a pendent member hinged thereto at one end, a latch bar hinged to the opposite end of said pendent member, the hinged end of said latch bar being adapted to have a link secured thereon, the pendent member having a releasing lug overlying .said hinged end of the latch bar, the extremity of said lug being so shaped that when the link secured on the latch bar is lift-' ed it will tend to guide the former between the extremity of the lug and the latch bar, and said main piece and the free end of said latch bar being provided with latching means adapted for being disengaged by the lifting of the latch bar.

fLiA hook of the character described com prislng a ma n piece, a pendent member hinged thereto at one end, a latch bar hinged to the opposite end'of said pendent member,

the hinged end of said latch bar being adapted to have a link secured thereto, thependent member having a releasing lug overlying said hinged end of the latch bar, the extremity of said lug being so shaped that when the link secured on the latch bar is lifted it will tend to guide the former be tween the extremity of the lug and the latch bar, said main piece and the free end of said latch bar being provided with latching means adapted for being disengaged by the lifting of the latch bar, and means for locking the pendent member with the main piece. 5. A hook of the character described comprising a main piece, a pendent member hinged thereto at one end, a. latch bar hinged to the opposite end of said pendent member, the hinged end of said latch bar being adapted to have a link secured thereon, the pendent member having a releasing lug overlying said hinged end of the latch bar, the extremity of said lug being so shaped that when the linksecured on the latch bar is lifted it will tend to guide the former between the extremity of the lug and the latch bar, and said main piece and the 'free end of said latch bar being provided with interlocking tongue and groove and with latch pin and recess respectively.

6; A hook of the character described comprising a main piece, a pendent member hinged thereto at one end, a latch bar hinged to the opposite end of said pendent member, the hinged end of said latch bar being adapted to have a link secured thereon, the pendent member having a releasing lu'goverlying said hinged end of the latch bar, said main piece and the free end of said latch bar being provided with interlocking tongue and groove and with latch pin and recess re ent member with the main piece.

CRIST B. PREISLER. 

